package com.muyan.common.utils;

import java.io.*;
import java.util.StringTokenizer;

/**
 * 文件操作
 */
public class FileUtil {

    private static String message;

    /**
     * 新建目录
     *
     * @param folderPath 目录
     * @return 返回目录创建后的路径
     */
    public static String createFolder(String folderPath) {
        String txt = folderPath;
        try {
            File myFilePath = new File(txt);
            txt = folderPath;
            if (!myFilePath.exists()) {
                myFilePath.mkdir();
            }
        } catch (Exception e) {
            message = "创建目录操作出错";
        }
        return txt;
    }

    /**
     * 多级目录创建
     *
     * @param folderPath 准备要在本级目录下创建新目录的目录路径 例如 c:myf
     * @param paths      无限级目录参数，各级目录以单竖线区分 例如 a|b|c
     * @return 返回创建文件后的路径 例如 c:myfac
     */
    public static String createFolders(String folderPath, String paths) {
        String txts = folderPath;
        try {
            String txt;
            txts = folderPath;
            StringTokenizer st = new StringTokenizer(paths, "|");
            for (; st.hasMoreTokens(); ) {
                txt = st.nextToken().trim();
                if (txts.lastIndexOf("/") != -1) {
                    txts = createFolder(txts + txt);
                } else {
                    txts = createFolder(txts + txt + "/");
                }
            }
        } catch (Exception e) {
            message = "创建目录操作出错！";
        }
        return txts;
    }

    /**
     * 新建文件
     *
     * @param pathAndName 文本文件完整绝对路径及文件名
     * @param fileContent 文本文件内容
     */
    public static void createFile(String pathAndName, String fileContent) {
        try {
            File myFilePath = new File(pathAndName.trim());
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
            }
            FileWriter resultFile = new FileWriter(myFilePath);
            PrintWriter myFile = new PrintWriter(resultFile);
            myFile.println(fileContent);
            myFile.close();
            resultFile.close();
        } catch (Exception e) {
            message = "创建文件操作出错";
        }
    }

    /**
     * 有编码方式的文件创建
     *
     * @param pathAndName 文本文件完整绝对路径及文件名
     * @param fileContent 文本文件内容
     * @param encoding    编码方式 例如 GBK 或者 UTF-8
     */
    public static void createFile(String pathAndName, String fileContent, String encoding) {
        try {
            File myFilePath = new File(pathAndName.trim());
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
            }
            PrintWriter myFile = new PrintWriter(myFilePath, encoding);
            myFile.println(fileContent);
            myFile.close();
        } catch (Exception e) {
            message = "创建文件操作出错";
        }
    }

    /**
     * 删除文件
     *
     * @param pathAndName 文本文件完整绝对路径及文件名
     * @return Boolean 成功删除返回true遭遇异常返回false
     */
    public static boolean delFile(String pathAndName) {
        boolean bea = false;
        try {
            File myDelFile = new File(pathAndName);
            if (myDelFile.exists()) {
                myDelFile.delete();
                bea = true;
            } else {
                bea = false;
                message = (pathAndName + "删除文件操作出错");
            }
        } catch (Exception e) {
            message = e.toString();
        }
        return bea;
    }

    /**
     * 删除文件夹
     *
     * @param folderPath 文件夹完整绝对路径
     */
    public static void delFolder(String folderPath) {
        try {
            delAllFile(folderPath); // 删除完里面所有内容
            File myFilePath = new File(folderPath);
            myFilePath.delete(); // 删除空文件夹
        } catch (Exception e) {
            message = ("删除文件夹操作出错");
        }
    }

    /**
     * 删除指定文件夹下所有文件
     *
     * @param path 文件夹完整绝对路径
     */
    public static boolean delAllFile(String path) {
        File file = new File(path);
        if (!file.exists()) return false;
        if (!file.isDirectory()) return false;
        boolean bea = false;
        String[] tempList = file.list();
        if (tempList == null) return false;
        File temp;
        for (String fileName : tempList) {
            if (path.endsWith(File.separator)) {
                temp = new File(path + fileName);
            } else {
                temp = new File(path + File.separator + fileName);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                delAllFile(path + "/" + fileName);// 先删除文件夹里面的文件
                delFolder(path + "/" + fileName);// 再删除空文件夹
                bea = true;
            }
        }
        return bea;
    }

    /**
     * 复制单个文件
     *
     * @param oldPathFile 准备复制的文件源
     * @param newPathFile 拷贝到新绝对路径带文件名
     */
    public static void copyFile(String oldPathFile, String newPathFile) {
        try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPathFile);
            if (oldfile.exists()) { // 文件存在时
                InputStream inStream = new FileInputStream(oldPathFile); // 读入原文件
                FileOutputStream fs = new FileOutputStream(newPathFile);
                byte[] buffer = new byte[1444];
                while ((byteread = inStream.read(buffer)) != -1) {
                    bytesum += byteread; // 字节数 文件大小
                    System.out.println(bytesum);
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
                fs.close();
            }
        } catch (Exception e) {
            message = ("复制单个文件操作出错");
        }
    }

    /**
     * 复制整个文件夹的内容
     *
     * @param oldPath 准备拷贝的目录
     * @param newPath 指定绝对路径的新目录
     */
    public static void copyFolder(String oldPath, String newPath) {
        try {
            new File(newPath).mkdirs(); // 如果文件夹不存在 则建立新文件夹
            File a = new File(oldPath);
            String[] file = a.list();
            if (file == null) return;
            File temp = null;
            for (String fileName : file) {
                if (oldPath.endsWith(File.separator)) {
                    temp = new File(oldPath + fileName);
                } else {
                    temp = new File(oldPath + File.separator + fileName);
                }
                if (temp.isFile()) {
                    FileInputStream input = new FileInputStream(temp);
                    FileOutputStream output = new FileOutputStream(newPath + "/" + temp.getName());
                    byte[] b = new byte[1024 * 4];
                    int len;
                    while ((len = input.read(b)) != -1) {
                        output.write(b, 0, len);
                    }
                    output.flush();
                    output.close();
                    input.close();
                }
                if (temp.isDirectory()) {// 如果是子文件夹
                    copyFolder(oldPath + "/" + fileName, newPath + "/" + fileName);
                }
            }
        } catch (Exception e) {
            message = "复制整个文件夹内容操作出错";
        }
    }

    /**
     * 移动文件
     */
    public static void moveFile(String oldPath, String newPath) {
        copyFile(oldPath, newPath);
        delFile(oldPath);
    }

    /**
     * 移动目录
     */
    public static void moveFolder(String oldPath, String newPath) {
        copyFolder(oldPath, newPath);
        delFolder(oldPath);
    }

    /**
     * 得到错误信息
     */
    public static String getMessage() {
        return message;
    }
}
